Automatic weighing-scale.



PATENTBD SEPT. 18, 1906.

P. PELZ. AUTOMATIC WEIGHING SCALE.

APPLICATION FILED MAY 9. 1905.

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` F. PELZ.

AUTOMATIC WBIGHING SCALE.

APPLIDATION FILED una. 1905.

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APPLICATION .FILED MAYQ. 1905.

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FERDINAND PELZ, OF GLIESMARODE, BRUNSVVlGK, GERMANY.

AUTOMATIC weleHlNG-SCALE.

Specification of Letters Patent.

:Patented Sept. 18, 1906.

Application. filed May 9,1905. Serial No. 259.541.

T0 all whom it may concern:

Beit known that I, FERDINAND PELz, a citizen of Germany, residing -at Gliesmarode, Brunswick, Germany, have invented new and useful Improvements in Automatic Weighing-Scales, of which the following is a specification.

This invention relates to a weighing-scale which is so constructed that the bucket first receives the main bulk of the charge to be weighed and then a supplemental charge. After the bucket has thus been filled to accurately counterbalance the weight it is automatically dumped, returned to its initial position, and recharged.

The scale is delicate in its operation, works quickly, and insures correct results.

In the accompanying drawings, Figure l is a side elevation, partly in section, of a scale embodying my invention; Fig. 2, a vertical transverse section, partly in elevation, thereof with some of the parts omitted or broken away. Figs. 3, 4, and 5 are details of the hopper and gates, showing the latter in consecutive positions; and Fig. 6, a detail of the automatic stopping mechanism.

The letter A indicates the frame of the scale, to which is fulcrumed at a the scalebeam a. The beam is provided at each end with a pair of oppositely-extending arms a2 a3. From the arms a2 is suspended by hangers b the beam-board I), carrying the weights b2. From the arms c3 are suspended a pair of hangers c cl, to which is fulcrumed at e the overbalanced unsymmetric bucket or receiver e, and which are guided by arms c d.

Vertically above receiver e there is a hopper f, having two differently-sized dischargenozzles f f2. Admission of the material to be weighed to the larger nozzle f is partly obstructed by a partition f4 intermediate the nozzles and by an inclined defiector f3, arranged above nozzle f/ and directed toward nozzle f2. By this construction the nozzle f2 must be covered up to the upper edge of partition f* before any material is admitted to nozzle f. Consequently there always remains in the hopper above nozzle f2 a deposit of material suflicient for the supplemental filling of the bucket and without regard to the inliow of material into the. hop- The outflow from the larger nozzle f is controlled by a supply-gate g, having arms g, that turn on arbors h. An opening g2 of the gate becomes alined with the smaller nozzle f2 in the closed position of the gate; The outflow from the nozzle f2 is controlled by an imperforate supply-gate t', fulcrumed. to arbor h by arms t. Stops vg3 t2 on the arms gV and i, respectively, engage an abutment Al and limit the downward movement of the gates. The diffusion of the material to be weighed is prevented by brushes g5, secured to the parts f and g, respectively.

To maintain the gate g in its open position, there is fulcrumed to arbor 7L a locking-lever y', against which rests a stud g4 of gate g. The lever j is locked in an inclined position when the bucket is raised by means of a pin e2 on the bucket, which en gages the lower free end of the lever j, Fig. l.

The gate i is maintained in its open position by a roller i3, journaled in one of the arms t. This roller rests upon an oiset k of a latch k, fulcrumed. at k2 and overbalanced atlcs. The latch c is locked in position by one arm of a lever or detent Z, which is fulcrumed at l. The other arm of this detent is located vertically above a knife-edge eX- tension b3 of one of the hangers b of beamboard b.

The lever '11 carrying the roller i3, 'is eX- tended beyond arbor h, as at t4, and to this extension is pivoted at m a catch m, guided by a pin m2 and a slot m3. The lower curved end of catch m is adapted to engage a hook c2, pivoted at c3 within a slot of hanger c and engaged by a pin or stop e3 of bucket e.

In order to cause the gates g and i to successively close prior to the counterbalancing of the weights b2 by the charged bucket e, the following construction has been devised: To frame A is fulcrumed at n a lever n, one arm of which is adapted to be engaged by a hook b4 of hanger b. The second longer arm of lever n is adapted to be engaged by a roller 0,.journaled between the upper bifurcated arm of a bell-crank o, fulcrumed to frame A at o2. The lower arm of bell-crank press roller o against lever n. A nose 04 on weight 03, adapted to engage a stop 05, limits the descent of the weighted bell-crank o. A weight p, slidable upon a rail p, mounted on lever n, permits the scale to be accurately ad; justed to different materials flowing at different speed.

In order to prevent the bucket from emptyreason of some defective operation of the scale, the construction shown in Fig. 6 has ing should it receive an excessive charge by IOO o carries a counterweight o3, which tends to f ishes, weights b2.. `When a quantity of the ma- 'iows through the nozzle f2 the weights b2 are been devised. The hanger d of bucket e has a bifurcated upper end d2, adapted for the rec'eption of a weight g. This weight has a slot g and a cross-arm g2 resting loosely upon fork d2. The slot g embraces a pin r on one arm of a three-arm lever 7', the second arm of which carries a weight r2, while its third arm has a hook r3, which is adapted to engage a pin or stop i5 ofv arm t.

The operation is as follows: When thel bucket e is empty and elevated, both gates g and t are raised, so that the larger nozzle f is open and the nozzle f2 is closed by gate g, Fig. 3. The material to be weighed should be so charged into hopper f that the latter is permanently illed to a certain level. The material will thus flow through nozzle f into bucket e. During this operation the counterweight o3, in conjunction with lever n, partly counterbalances, and thereby diminterial to be weighed has thus been received by bucket e, which corresponds to the diminished weights b2, the bucket e will descend, together with left arm of lever n. The descent of the bucket will withdraw stop e2 from locking-lever y', which thus liberates nose g4 of gateg. The latter now swings down to close nozzle f and open nozzle fl, Fig. 4. The descent of leftV arm of lever n, causes a corresponding descent of weight 03 until the nose o4 contacts with the stop 05, and thereby relieves lever n from the burden of the weight. Thus while the material only counteracted by the excess of weight of the left arm of lever fn. over its right arm. When the bucket has been illed to balance the reduced weights b2, the extension b3 of hanger will in ascending tilt detent Z to release latch k and liberate roller Q13. The gate t' will -thus drop to close nozzle f2 and stop the flow of the material fromthe hopper, Fig. 5. The object of the slight premature closing of gate .t is to allow for the small quantity of material dropped from the hopper while the gate is being closed. The closing of gate fi' will swing extension i4 upward to raise catch m into engagement with hook c2 and cause the latter to liberate pin e3. The bucket being thus unlocked will now tilt on fulcrum e and discharge its contents'into a chute s, after which the bucket will automatically right itself and be raised by weights b2 into its initial position. While the bucket is thus righted the stop e2 will throw back lever j, and the latter will, by engaging stud g4', open gate g. The stud g4 by engaging a corresponding nose t of gate i will simultaneously open the latter. Should for some reason an excessive Icharge be received by bucket e, the latter will descend beyond its normal position and will thereby permit the descent of weight g. lever r and cause its hook 113 to engage stop t5, and thereby lock gate i.' This prevents the catch m from releasing bucket e, so that the latter will not be dumped.

A suitable registering device is preferably connected with the scale.

What I claim is- 1. A scale provided with a hopper, a pair of nozzles communicating. therewith, a partition between the nozzles, a deflector above the iirst nozzle and directed toward the second nozzle, and a pair of gates for successively closing the nozzles, substantially as specied.

2. A scale provided with a beam, a bucket suspended from one end thereof, a hanger suspended from the other end of the beam, a hook on said hanger, a lever adapted to be engaged by the hook, a counterweight adapted to be brought into or out of engagement with the lever, a detent adapted to be engaged by the hanger, a catch controlled by the detent, and a supply-gate operatively connected with the catch, substantially as specified.

3. A scale provided with a pair of discharge-nozzles, a pivoted perforated gate for closing the first nozzle, a pivoted imperforate gate for closing the second nozzle, a beam, an overbalanced bucket suspended from one end thereof, a hanger suspended from the other end of the beam, a hook on said beam, alever engaged by thehook, a counterweight adapted to engage the lever, means for closing the perforated gate upon'the descentof the bucket, means for disengaging the counterweight from the lever, a detent adapted to be engaged by the hanger, and a latch controlled by the detent and operatively connected to the imperforate gate, substantially as specified.

4. A scale provided with a beam, a hanger suspended therefrom, a bucket pivoted to the hanger, a weight supported upon the hanger, a three-arm lever adapted to be engaged by the weight, and a discharge-gate adapted to be engaged by the lever, substantially as specified.

Signed by me at Brunswick, Germany,

this 22d day of April, 1905.

` FERDINAND PELz.

Witnesses:

JULIUs SECKEL, ADoLF MALETZKI.

The latter will tilt,

IIO 

